Lock-shoe.



No. 733,543. PATENTED JULY 14, 1903.

W. L. BENSON.

LOCK SHOE.

APPLICATION FILED AUG. 9, 1902.

N0 MODEL.

'Patented July 14, 1903.

PATENT OFFICEt WILLIAM L. DENSON, OF ELMIRA, NEl/V YORK.

LOCK-SHOE.

SPECIFICATION forming part of Letters Patent N o. 7 33,543, dated July14, 1903.

Application filed August 9, 1902, Serial No, 119,062. (No model.)

To ctZZ whom it may concern.-

Be it known that I, WILLIAM L. DENsoN, a citizen of the United States,residing at Elmira, in the county of Ohemung and State of New York, haveinvented new and useful lmprovements in Lock-Shoes, of which thefollowing is a specication.

This invention relates to lock-shoes for use on wagon-wheels in lockingthe latter while moving downwardly over hills; and the object of thesame is to provide a shoe which will prevent the wagon from slidingsidewise on icy or laterally-inclined roadways and overcome the seriousdamage often resulting from a wagon sliding around and tipping over, thepresent form of shoe also being adapted to form a rough-lock without theuse of a chain, and the consequent injury to the felly of the wheel asin the use of the old form of rough-lock.

The invention consists in the construction and arrangement of theseveral parts, which will be more fully hereinafter described andclaimed.

In the drawings, Figure l is a perspective view of a lock-shoe embodyingthe features of the invention. Fig. 2 is a side elevation of the same.Fig. 3 is a transverse vertical section thereof.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The improved form of shoe comprises a base-plate l, which is curvedlongitudinally to conform to the curvature of a wheel. Rising from theopposite portions of the baseplate are side'ianges 2, which serveasguards to prevent the wheel in engagement with the base-plate fromsliding off the latter'. The side flanges or guards'2 extend downwardlyat the rear in curved beveled planes to the end of the base-plate l andalso have a similar construction at the front of the shoe, but terminatein rear of the front end of the base-plate l, so as to have a part ofthe latter project in advance of the wheel engaging the same. The frontend of the base-plate l has a draft-link 3 movably mounted therein forconnection of a chain or analogous device running from the draft gear ordevices in ad Vance. Extendinglongitudinally of the central portionofthe under side of the base-plate l is a rib et, which is curvedupwardly, as at 5, toward Vthe base-plate at the front end to avoid theformation of an obstructing angle or abutment. On the under side of thesaid plate l are supplemental ribs or diggers 6, which project obliquelyfromY the opposite sides of the rib 4 to the outer sides of thebase-plate. The rib 4 extends below the ribs 6, and the latter arearranged obliquely, as set forth, to overcome the material obstructionthat would exist if the said ribs stood outwardly in planes at rightangles to the ribs 4.

The shoes are applied to the Wheels by causing the latter to run intothe space between the guards 2 and bear upon the baseplate l, thedraft-links 3 then being connected up as required. rlhe weight of theWagon and the load thereon will cause the rib 4 to sink into the surfaceof the road-bed or ice or snow and provide a irm hold to prevent thewagon to which the shoes are applied from sliding or slewing sidewiseand overcoming any tendency to breakdowns, tip-overs, and other seriousaccidents. The ribs 6 dig into the road-bed or ice or snow covering thelatter and form a rough-lock, thus holding heavily-loaded wagons onsteep hills in perfect safety and security and under control of adriver. It will be understood that the more weight there is on the wagonthe firmer the shoe will grip into the road-bed.

The shoe is made in one piece of material and preferably formed bycasting on a chill, thereby making the ribs and wearing partspractically as hard as steel and strong and durable.

Having thus fully described the invention, what is claimed as new is- Alock-shoe of the class set forth, comprising a base-plate curvedlongitudinally to conform to the curvature of -a wheel adapted to bedisposed therein and having oppositely upwardly projecting anges to formguards, a longitudinal rib depending from the center of the under sideof the said base-plate and extending fully from the front end to therear than lthe said longitudinal rib, all of the Said end of thebase-plate, and supplemental ribs parts being of integral construction.lo 'A extending outwardly in reverse lateral planes In testimony whereofl affix my signature from opposite sides of the longitudinal rib inpresence of two witnesses.

and terminating coincident-ly with the outer WILLIAM L. DENSON. surfacesof the guard-Hanges, the supple- VVit-nesses:

mental ribs being disposed obliqnely in a HOWARD E. BAKER,

rearward direction and having a less depth l WILLIAM J. BARTER.

